bleeder valve location for 04 g35

[milhan]

Does anyone know where the coolant bleeder valve is on the G35? I was told near the battery compartment, but I can' seem to find it? plastic Phillips screw I think. Just had the coolant flushed by a so called pro, and now, I am getting intermittent heat, then cold. upper hose never seems to have a flow, but temp gauge is always normal?

[smockers83]

If your sporadic heat was due to your engine temp and coolant, your engine would be running cold as well.

[milhan]

uhhhh what? I don't follow you. What do you think the problem is if the temp gauge is normal, but heat output is not? Hot, then cold, then hot.

[infinititech1]

does the car over heat? what you need to do is make sure the engine is completely cold, take off the rad cap and start the car and let it idle with the heat on full blast until it gets hot or starts bubbling over

[milhan]

no it doesn't overheat. the temp gauge is normal. The fans don't kick on either?

[smockers83]

When its cold, like it is now in WI and here in MI, the fans won't kick in until the heating system is able to produce actual heat, to save you from getting cold air blown at you. It'll take a few minutes probably.

If the problem was due to your engine coolant change, what would most likely be happening is that your thermostat on the engine would be stuck open, not allowing the engine to heat up normally and therefore no hot air for you in the cabin. But that's not the case (and highly unlikely with a new thermostat), since your engine is operating at normal temp.

But if it takes longer than a few minutes for the fans to turn on and produce no heat, or intermittent heat, something is wrong with the system, so you should probably get it checked out. That's all that I can say...I'm not an expert, sorry!

[telcoman]

Does anyone know where the coolant bleeder valve is on the G35? I was told near the battery compartment, but I can' seem to find it? plastic Phillips screw I think. Just had the coolant flushed by a so called pro, and now, I am getting intermittent heat, then cold. upper hose never seems to have a flow, but temp gauge is always normal?

Sounds like you have an air pocket in the cooling system? Open the radiator cap when cold. Start the engine and let it warm up while monitoring the coolent level in the radiator. Hopefully the air will come out?Your G sound like it just needs a good fart.

Telcoman

[milhan]

Thanks guys, I will try and bleed the system.

[rn79870]

You said your fan wasn't coming on. Is it not coming on at all? Try the same test but turn on the A/C. Does it come now?

[milhan]

Took it back to the mechanic expecting to have a serious brawl. He repeated the process and in fact said there was air in the system, and apologized. He said the Infinity was different from other cars in the way it is supposed to be bled. I think they were just to lazy to do it right the first time. Thanks everyone.

[smockers83]

Completely overlooked that one, assumed the mechanic would've known what he was doing. Well we know what happens when you assume.

[milhan]

The problem with periodic heat is back. Engine temp is normal, sometimes after getting heat it will just start blowing cold air, and no, the A/C is not on. Other times I will drive the car for a half hour with still no heat? I jst want to know where the bleeder valve for the cooling system is.

[tollboothwilley]

Have you let the car idle with the radiator cap off?? This will help bleed out air pockets.

[milhan]

Then why is there a bleeder valve? Are you sure this will work?

[tollboothwilley]

This is the easiest way. If the air bubble works its way up to the top it will escape. Try this first. Once the car is running at normal temp you will see the fluid start to boil. Then you will know its hot. If it doesn't consistently run good without the hot/cold that you are experiencing then you will need to bleed it out with the valve. but, this should work.

[milhan]

Okay I will try this, but once again, WHERE is the bleeder valve located?

[Tampa G35 Sedan 6MT]

should be on the bottom of the radiator or on the side towards the bottom. That way the fluid can flow "out"

[tollboothwilley]

uh, thats the radiator "drain" plug

he wants to "bleed" the air out, not release all the fluid. haha

have you got a service manual (digital in PDF) yet? Follow the STICKIES

[milhan]

uhhh whats a sticky? I will try a search for manuals

[milhan]

OK here is the deal. Just let it idle for 15 minutes. Outside fan not on. Temp gauge normal. In the middle. NO heat, blowing cold air!!

Top radiator hot! Lower radiator hose COLD!!!! I opened the cap and it fluid running out, and it is hot.

Still no heat

[cheapazz]

Sounds like a bad thermostat to me. Stuck closed for some reason. Rare, but it does happen.

[milhan]

If it was stuck closed wouldn't the car overheat?

[tollboothwilley]

Generally it would have a problem with overheating, but it sounds like the thermostat is stuck. Maybe just half way. It could just be "sticking" every now and again.

Also, the in dash temp gauge has been found to not be super accurate.

I would replace your thermostat. Talk to you mechanic and see what he says.

[tollboothwilley]

uhhh whats a sticky? I will try a search for manuals

Stickies are the threads at the top of the forum page that have a orange bar that says "STUCK".

http://forums.g35club.org/zerothread/323283

that is a link to the main sticky that says "READ THIS FIRST"

read through that stuff and you will find a lot of info, including the manuals

[SteveTheTech]

Okay I will try this, but once again, WHERE is the bleeder valve located?

Its on the right heater hose.

Here is the procedure straight from the book.

REFILLING ENGINE COOLANT1. Install reservoir tank, and radiator drain plug.

CAUTION:Be sure to clean drain plug and install with new O-ring.If cylinder block drain plugs are removed, close and tighten them.

2. Remove air relief plug on heater hose.

3. Fill radiator and reservoir tank to specified level.Pour engine coolant through engine coolant filler neckslowly of less than 2 (2-1/8 US qt, 1-3/4 lmp qt) a minuteto allow air in system to escape.

Use Genuine Nissan Long Life Antifreeze/ Coolant orequivalent mixed with water (distilled or demineralized).

Refer to the GI section, "RECOMMENDED CHEMICAL PRODUCTSAND SEALANTS" .When engine coolant overflows air relief hole on heater hose,install air relief plug with new O-ring.

4. Warm up engine to normal operating temperature with radiator cap installed.

5. Run engine at 3,000 rpm for 10 seconds and return to idle speed.Repeat two or three times.

CAUTION:Watch water temperature gauge so as not to overheat engine.

6. Stop engine and cool down to less than approximately 50°C (122°F).Cool down using a fan to reduce the time.If necessary, refill radiator up to filler neck with engine coolant.

Radiator drain plug:: 0.78 - 1.6 N·m (0.08 - 0.16 kg-m, 7 - 14 in-lb)

Engine coolant capacity (Approximate)(with reservoir tank at “MAX” level): 8.5 (9 US qt, 7-1/2 lmp qt) for A/T models: 8.7 (9-1/4 US qt, 7-5/8 lmp qt) for M/T models

Reservoir tank capacity (at “MAX” level): 0.8 (7/8 US qt, 3/4 lmp qt)Air relief plug:: 0.78 - 1.6 N·m (0.08 - 0.16 kg-m, 7 - 14 in-lb)

ENGINE COOLANT

7. Refill reservoir tank to “MAX” level line with engine coolant.

8. Repeat steps 3 through 6 two or more times with radiator cap installed until engine coolant level no longerdrops.

9. Check cooling system for leaks with engine running.

10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000rpm with heater temperature controller set at several position between “COOL” and “WARM”.

Sound may be noticeable at heater unit.

11. Repeat step 10 three times.

12. If sound is heard, bleed air from cooling system by repeating step 3 through 6 until engine coolant level nolonger drops.

Clean excess engine coolant from engine.

FLUSHING COOLING SYSTEM

1. Fill radiator with water until water spills from the air relief hole, then close air relief plug.Fill radiator andreservoir tank with water and reinstall radiator cap.

2. Run engine and warm it up to normal operating temperature.

3. Rev engine two or three times under no-load.

4. Stop engine and wait until it cools down.

5. Drain water from the system.

6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

I will add this to our articles section in case anyone else has this issue. If you have access to a vacuum refilling tool I would highly recommend using that to pull a vacuum on the system. This will alleviate the need to rev the engine to get heat at idle and a stable coolant temperature.

[SteveTheTech]

Coolant Article

For anyone else who may need some assistance with their coolant service. This is one of those things that you have to get right or there is a strong possibility of damaging expensive components. The coolant drain plug and air bleeder plus are made of plastic and strip easily, I just want to warn you as no one ever warned me about this and it is a PITA to fix.

I would also advise getting a radiator funnel for like 20 something bucks at your local autoparts store. Lifting the front wheels off the ground (using proper jacking procedures) may be required to rev the bubbles out of the heater core. Jacking will make the radiator the highest point in the circuit and with a funnel you will see many more bubbles purge out when revving the engine. Good luck Guys

[milhan]

Thanks a bunch Steve. Will giver a go at it and see what happens

[G_whizz]

BAM!!!

Nic job Steve!

I see the search is weak with this one.



J/J Milhan..

[milhan]

Please explain G_Whizz what you mean

[Tampa G35 Sedan 6MT]

Nice work once again steve!

DJ